I don't understand Miles Davis' "Kind of Blue"

I'm new to Jazz. While I enjoy Amstrong and Fitzgerald duo and some of Amstrong's Hot Five and Hot Seven pieces, I fail to appreciate "Kind of Blue" which is praised by many as cornerstone CD in jazz. What I hear from the CD is background music that is repetitous throughout the song and seemingly random saxo, or similar instrument - pardon my ignorance of instruments, in the front. The background music bothers me because it's simple and repetitive. Perhaps this is not my type of music. Or should I listen to other CDs before appreciate this one?

Can someone educate me what is great about this CD?